very happy picture

It's a moment of childhood glee and you are doing a great job with it, L&C. Up until the time I was about five my family nickname was 'Bear' because they couldn't make me keep my clothes on. Every time my poor mom turned around I was zippin' around naked as a jaybird. It's a natural state for children. Things sexual should be a million miles away. I'm wondering if adding some complimentary colours into your composition. Those beautiful skin tones have lots of oranges in the highlights and purples in the shadows. While the green compliments the oranges, maybe some blue highlights in the water will bring out the richness of the browns. You've picked a ref photo that has a very difficult perspective to draw because it's angled looking down at the children. Lots of tricky foreshortening. One thing I've noticed when I look at a drawing or painting that portrays water very convincingly is that the lines defining the water are almost always totally horizontal. The mid-chest rib shadows on the big sister seem off center. And if I'm looking at it correctly, the little sister has her legs bent and is turned to the side enough that it doesn't seem like we'd be able to see her little pudendum. You've got a lot of the basics of this drawing in place, now it's about refinement.

because the creases were so deep they just looked old, so I figured it was better to make adjustments rather than staying true to the ref pic. I am going to give it a rest for a while then take another look at it